Metallic socket-bushing for lasts



(No Model.\

- W. MILLER. v Metallic Socket Bushing for Lasts.

No. 235,000. Patented Nov. 30,1880.

Umrnn STATES ATENT Farce.

METALLIC SOCKET-BUSHING FOR LASTS.

SPECIFICATION forming part of Letters Patent No. 235,000, dated November30, 1880.

Application filed April 7, 1880. (No modcLl To all whom t't may concernBe it known that I, WILLIAM MILLER, of Boston, in the county of Suffolkand State of Massachusetts, have invented certain Improvements inMetallic Socket-Bushings for Lass, of which the following is aspecifica- 1y invention consists in a new and im- 1 Wed form of metallicbushing for insertion into a last to prevent the wear to which the sameis subjected from the action of the jack-pin.

In the accompanying drawings, forming part of this specification, Figure1 shows an elevation of my improved bushing; Fig. 2, a longitudinalsection on the line 00 w of Fig. 1; Fig.3, a transverse section on theline y y, Fig. 1, and Fig. 4 a last with my invention attached. Figs. 5and 5 exhibit a modification of my invention, Fig. 5 being an elevation,and Fig. 5 a transverse section on line z 2:, Fig. 5, and Fig. 5 alongitudinal section on line 2 2, Fig. 5, of said modification.

In these several figures the same letters refer to the same parts.

It is well known that during the various operations which a shoeundergoes in making and finishing, and in which the last is required tobe held in position by a jack-pin inserted in asocket in the top of thelast, the action of the pin upon the wood will soon enlarge the socketand render it impossible to hold the last firmly in place.

It is already common to protect the socket by a plate screwed upon thetop of the last; but my invention provides a bushing new in form, betteradapted to resist the wear of the pin, and more conveniently affixed tothe last than any now in use; and this bushing I will now describe.

My invention consists in the metallic tube A, having its inner endsplit, as shown at c. This tube is beveled internally at its inner end,as shown at c, and its bore above the beveled portion is of sut'ficientsize to receive the jack-pin. The inner end of the tube is also reducedexternally, so as to form an acute angle at the edge d.

The construction of the inner end of the tube just described adapts itto be expanded and cause the tube to become affixed to the last, ashereinafter explained.

' The outer end of the tube is provided with a flange, b, which willproject slightly above the surface of the last when the tube is insertedin its socket. This flange has a lip for the purpose of receiving apivoted button, I), placed upon the last-block and adapted to engagewith the fiange, in order to maintain the lastblock securely inposition. In affixing this bushing to the lastthe tube A is inserted inthe socket, as shown in Fig. 4. A plug or mandrel is then driven intothe socket thus protected, and by the action of this plug upon thebeveled surface 0 the lower end of the tube will be expanded, and thelower edge, having been reduced to an acute angle, will be forced intothe wood, and thus hold the tube firmly in place when the mandrelisremoved. By this means the socket of the last is readily provided witha metallic bushing at once secure and durable, and which willeffectually prevent the wear to which an unprotected socket is nowsubjected in use. No screws are required to be put into the last, thesimple driving of the mandrel being all thatis nccessary to affix thebushing in the socket.

It is obvious that my invention is applicable to all articles in which asimilar bushing is required or may be useful.

The tube A may be cast in one piece or in two pieces, as may be foundmost convenient, and if cast in two pieces I makeuse of the modifiedform shown in Figs. 5 and 5 and 5". The modification consists in theform of joint shown at c and 6, designed to prevent the separate halyesof the tube from Working out of the socket. In all other respects thecharacteristics of my invention are preserved, precisely as when thetube is cast in one piece, and the invention will be found equallyefficacious for the purpose set forth whether the tube is cast in one orin two pieces.

I do not limit myself to splitting the lower end of the tube, as it isobvious that if the tube were not split it could still be expanded bydriving the mandrel, the metal yielding to the mandrel, which mightcrack the beveled end, and so accomplish the same result as if the tubewere split.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

1. As a new article of manufacture, a bush- 5 ing for insertion into alast or other article, composed of a metallic tube beveled internally atits inner end. and thus adapted to be expanded at its inn lrvend by theinsertion of a plug or mandrel when the bushing is in its :0 socket inthe last.

2. A bushing composed of a tube beveled internally at its inner end, andreduced externally to form an acute angle at said inner end,substantially as and for the purpose described.

In testimony whereof I have signed my 15 name to this specificatiominthe presence of two subscribing Witnesses, this 31st day of March, A. D.1880.

WILLIAM MILLER.

Witnesses e H. G. WADLIN, O. F. BROWN.

